{
  "manageEntity": {
    "action": "Save",
    "entityId": "527144784",
    "entityType": "Track",
    "nonce": "0x6305bb0eaade7df853aabd78d3ae9c33a73695c4983ad08de3c2ba6827bb90bd",
    "signature": "0xe3b82be05de84b53b060c35538af4cac862686bc0cdaf8c87a3cee71b4cc547e0185a864ae4f43d5aa8fa3c9c7b28aadbb7434f0d5e3992ae4dc305402c233951b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}